Air Stagnation Advisory

URGENT - WEATHER MESSAGE
National Weather Service Boise ID
846 PM MST Sat Dec 13 2025

IDZ011>014-016-028-033-ORZ061>064-142200-
/O.EXT.KBOI.AS.Y.0004.000000T0000Z-251216T1200Z/
West Central Mountains-Lower Treasure Valley-Boise Mountains-
Upper Treasure Valley-Western Magic Valley-Camas Prairie-Upper
Weiser River-Harney County-Baker County-Malheur County-Oregon
Lower Treasure Valley-
Including the cities of Fairfield, Pine, Malheur City, Nampa,
Diamond, Cambridge, Ola, Council, Cascade, Goodrich, Soldier,
Prairie, Big Creek, Buchanan, Glendale, Baker, McCall, Crane,
Burns, Anderson Dam, Fruitvale, Warm Lake, Selby, Dunnean,
Venator, Cuprum, Nyssa, Ontario, Caldwell, Indian Valley, Blaine,
Corral, Mesa, Hill City, Bear, New Princeton, Twin Falls, and
Boise
846 PM MST Sat Dec 13 2025 /746 PM PST Sat Dec 13 2025/

...AIR STAGNATION ADVISORY NOW IN EFFECT UNTIL 5 AM MST /4 AM PST/
TUESDAY...

* WHAT...An extended period of stagnant air, with light winds and
  little vertical mixing. This is due to an inversion near the
  surface that will continue to trap pollutants.

* WHERE...Portions of south central and southwest Idaho and
  northeast and southeast Oregon.

* WHEN...Until 5 AM MST /4 AM PST/ Tuesday.

* IMPACTS...Poor air quality may cause issues for people with
  respiratory problems.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons with respiratory illness should follow their physicians
advice for dealing with high levels of air pollution during periods
of stagnant air.

&&

$$

JDS